2
HT 644-01
Operating instructions
Contents
Page
Unit structure
3
Survey of functions
4
Meaning of the unit buttons
4
Volume settings
4
Meaning of the LEDs
4
Telephone operation
5
Calling a user
5
Accepting door calls
5
Door release
5
Transferring calls between two users
5
Light switching
5
Remote control functions
5
Call silencing
5
Dial repeat
5
Call diversion (Rerouting)
5
Collective call
6
Callback function
6
Alarm and emergency calls
6
Concierge function
6
Additional functions by the MFM 611-10
7
Error code table
7